Amid a sea of London-related apps hoping to capitalise on this summer's Olympic Games, Heuristic Media's stands out for its craft and depth. It's a reference guide with more than 6,000 articles and 2,000 images, along with 360-degree views, spinning Museum of London artefacts, audio tours, and a slick timeline to find your way through it all.iPad

British retailer Marks & Spencer joins the App Store rush with an iPhone app providing e-commerce, shopping tips, social features and barcode-scanning features, while synchronising your shopping basket with its website.iPhone

Following the launch of the official Olympic Games 'Join In' app a few weeks ago, now there's an official app for the Games themselves. That means news, schedules, results and medal tables for all the events between 25 July and 12 August. The link above is for Android, but here's the iOS version.Android / iPhone / iPad

Or the Pre-school Learning Alliance Choosing Childcare App, to give this its full name. It's a way for parents in the UK to find nearby childcare providers and read their latest Ofsted inspection report, along with tips on how to get children settled in to childcare.iPhone

This is a nifty idea: a collection of short stories, each under 300 words, designed to be "read on the bus, in the subway/tube or while the kettle boils". Born out of an initiative from the University of Sussex, Aimer Media's app also lets readers submit their own stories.iPhone / iPad

This Android app is designed for Samsung's Galaxy Note – well, any Samsung device with a stylus – working as a "digital sketch book" tracking location and adding photos, videos, text and audio recordings.Android

Virgin's UK train service hits Windows Phone Marketplace with an app that includes timetables, journey-planning and ticketing. The latter includes buying tickets, and being sent them directly to the device.Windows Phone

"Stunning new graphics!" promises the App Store listing for this reboot of Konami's Frogger franchise. Well, that's rather optimistic – it still looks more like a game made 30 years ago. Even so, the car-dodging leapery remains intact.iPhone / iPad